| John O'Neill |
O'Neill (Viscountcy) |
Sat 3rd Oct 1795 |
Mon 18th Jun 1798 |
| Charles Henry O'Neill |
O'Neill (Viscountcy) |
Mon 18th Jun 1798 |
Thu 25th Mar 1841 |
| John Bruce Richard O'Neill |
O'Neill (Viscountcy) |
Thu 25th Mar 1841 |
Mon 12th Feb 1855 |
| Laurence Harman Harman |
Oxmantown (Viscountcy) |
Fri 2nd Oct 1795 |
Mon 20th Apr 1807 |
| John Bennet |
Ossulston (Barony) |
Tue 24th Nov 1682 |
Fri 11th Feb 1695 |
| Charles Bennet |
Ossulston (Barony) |
Fri 11th Feb 1695 |
Thu 21st May 1722 |
| Charles Augustus Bennet |
Ossulston (Barony) |
Fri 20th May 1859 |
Mon 18th Dec 1899 |
| Peter Grey Bennet |
Ossulston (Barony) |
Sun 27th Apr 1980 |
|
| Charles Augustus Bennet |
Ossulston (Barony) |
Tue 10th Dec 1822 |
Fri 20th May 1859 |
| Charles Bennet |
Ossulston (Barony) |
Tue 27th Oct 1767 |
Tue 10th Dec 1822 |
| George Montagu Bennet |
Ossulston (Barony) |
Mon 18th Dec 1899 |
Thu 9th Jul 1931 |
| Charles Augustus Ker Bennet |
Ossulston (Barony) |
Thu 9th Jul 1931 |
Wed 1st Dec 1971 |
| Charles Augustus Grey Bennet |
Ossulston (Barony) |
Wed 1st Dec 1971 |
Sun 27th Apr 1980 |
| Gavin Campbell |
of Ormelie, in the County of Caithness (Earldom) |
Sat 11th Jul 1885 |
Thu 19th Oct 1922 |
| James Butler |
of Ormond (Dukedom) |
Mon 9th Nov 1682 |
Wed 21st Jul 1688 |
| John Campbell |
of Ormelie (Earldom) |
Mon 12th Sep 1831 |
Sat 29th Mar 1834 |
| John Campbell |
of Ormelie (Earldom) |
Sat 29th Mar 1834 |
Sat 8th Nov 1862 |
| Robert Harley |
of Oxford and Mortimer (Earldom) |
Sat 23rd May 1711 |
Sun 21st May 1724 |
| Edward Harley |
of Oxford and Mortimer (Earldom) |
Fri 8th Oct 1790 |
Thu 28th Dec 1848 |
| Alfred Harley |
of Oxford and Mortimer (Earldom) |
Thu 28th Dec 1848 |
Wed 19th Jan 1853 |